Seat for vehicles

Abstract

A seat for vehicles is described. The seat comprises a support structure for a cushion and a support structure for a seat back, as well as a respective stuffing part supported at least partially by the said structure. The main feature of this seat is that the said support structure has a cross-section having a profile such as to allow an engagement of at least partially mating surfaces, one of which pertains to the structure and the other to at least one component of the seat.

What I claim is: 
     
       1. A seat for vehicles comprising a support structure for a seat cushion, a support structure for a seat back, and respective stuffing parts at least partially supported by said structures; said support structures each having an inner surface configured to receive and be engaged by an element, such as a spring, forming a part of said seat; each of said support structures having an outer surface which includes a recessed zone adapted to receive and restrain therein an auxiliary element, said recessed zone having the configuration of a cavity with a restricted opening; said auxiliary element having a first portion adapted to be forced and snap-fastened into said zone and a second portion which acts as a cover element for the outer surface of said support structures, such that said auxiliary element contacts an end portion of a surface covering material for said stuffing, locks said material inside said zone and covers the outer surface of said support structures and the contiguous areas of said surface covering material. 
     
     
       2. A seat as claimed in claim 1, wherein each of said structures has a second recessed zone adapted to receive a portion of an additional element, said additional element being at least partially disposed in a plane which enables it to oppose forces parallel to the respective planes of said structures, said additional element having a portion of its surface of the same shape as and being fixed within said second recessed zone. 
     
     
       3. A seat as claimed in claim 2, wherein said additional element at least partially forms a portion of said support structures, allowing variation of the length and width of said seat cushion and seat back. 
     
     
       4. A seat as claimed in claim 2, wherein said recessed zone and said second recessed zone are coextensive.